Science & Mathematics - 6 September 2007

2007-09-06 15:14:41 · 2 answers · asked by jagz r 1 in Zoology

i've got this AP chem lab due tomorrow morning and i have no clue on the answer to this question. Please can you help me out? I would really appreciate it...

The lab was about precipitating silver (which become silver chloride after a few procedures) from a dime while copper chloride is filtered out. The silver chloride is in a hot crucible and here's the question...

If the crucible containg the silver chloride is not cool whent he mass is determined, with the calculated percent silver be too high or too low? Why?

p.s. i know you may not have very much of a clue of what im talking about but can you please give me an idea of what you think..because i have no clue...thankyou sooooooooo much!

2007-09-06 15:13:28 · 2 answers · asked by howyoudoin' 1 in Chemistry

how is focal length measured on a reflector telescope?Is it the length of the tube or is it the legnth from the primary mirror to the secondary mirror?

2007-09-06 15:11:57 · 8 answers · asked by Anonymous in Astronomy & Space

I took a recent trip to the zoo, did some filming and can't remember for the life of me what this monkey is called. http://i243.photobucket.com/albums/ff227/KugarWeb/uvs070907-002.jpg

2007-09-06 15:08:18 · 6 answers · asked by kugarweb05@btinternet.com 2 in Zoology

b)would its exhaust heat the surrounding air? c)would it vibrate?Would any of its fuel go unused?Explain.

2007-09-06 15:07:16 · 3 answers · asked by Anonymous in Physics

2007-09-06 15:07:06 · 1 answers · asked by kamal 1 in Physics

Ok so I just need help with this one so I can see how to do the rest of them.

Simplify

4[2x-(3-5x)] + 3[3x-(4+x)]

And do it step by step so I can see the steps to simplifying an equation like this ty.

2007-09-06 15:05:13 · 6 answers · asked by JunkYardPuppy 2 in Mathematics

How is aperture measured?Is it the opening of the telescope or the size of the mirror,or should they be the same size?

2007-09-06 15:02:36 · 6 answers · asked by Anonymous in Astronomy & Space

A. Dense connective
B. Areolar
C. Elastic connective
D. Hyaline Cartilage

More than one answer can apply.

2007-09-06 15:01:39 · 1 answers · asked by jokool915@sbcglobal.net 2 in Biology

If you are paid $12 an hour for up to 40 hours per week and a time and a half overtime, how many hours would you have to work in a week to earn $624?

My teacher told me to use this equation for it:

624 = 12(40) + 18(h-40)

My question is: Can someone explain to me WHY that equation came out of that word problem?

Step by step, please.

2007-09-06 15:01:13 · 4 answers · asked by RAWR. 5 in Mathematics

(in words and in kilometers)

2007-09-06 14:59:43 · 9 answers · asked by Daishell G 1 in Astronomy & Space

2007-09-06 14:58:27 · 7 answers · asked by khg 1 in Geography

a.) oxygen
b.) food
c.) water
d.) adequate body temperature
e.) atmospheric pressure

2007-09-06 14:58:14 · 4 answers · asked by brewer37 1 in Biology

size it is not an issue just final resistance in ohms.....how many turns of wire or how many ohms of resistance ?

thanks for any feed back.

2007-09-06 14:57:18 · 7 answers · asked by hector596 2 in Engineering

show all the steps please!! :-D thanks!

2007-09-06 14:56:48 · 7 answers · asked by Anonymous in Mathematics

2007-09-06 14:56:04 · 7 answers · asked by Joe C 1 in Astronomy & Space

2007-09-06 14:55:49 · 3 answers · asked by blanca r 1 in Geography

no detail

2007-09-06 14:53:19 · 2 answers · asked by teresita s 1 in Astronomy & Space

4t-3tsxs+sxsxs for t= -2 and s=-3 thanx

2007-09-06 14:49:11 · 2 answers · asked by Lacuna Coil 2 in Mathematics

2007-09-06 14:48:48 · 5 answers · asked by blanca r 1 in Earth Sciences & Geology

Question Details: A truck starting from rest (not moving) along a straight road has an acceleration of 1.7 m/s squared.

How far has it gone after
1.2 s?
2.4 s?
3.6 s?

2007-09-06 14:47:05 · 3 answers · asked by Anonymous in Mathematics

After a ball rolls off the edge of a horizontal table at time t = 0, its velocity as a function of time is given by the following equation.

vector v=1.9i m/s-9.8tj m/s^2


The ball's displacement away from the edge of the table, during the time interval of 0.390 s during which it is in flight, is given by the following integral.

change of vector r = integral from 0 to .390 S of vector vdt

To perform the integral, you can use the calculus theorem below.

integral of A + Bf(x) dx = integral Adx + B integral of f(x) dx

You can think of the units and unit vectors as constants, represented by A and B. Do the integration to calculate the displacement of the ball.

find i hat

and find j hat

2007-09-06 14:46:42 · 1 answers · asked by surfing86 2 in Physics

I can't seem to get them right!

Thanks in advanced. :)

Evaluate the expression and write the result in the form a + bi.
(√16 - √-14)(√32 - √-28)

&
Evaluate the expression and write the result in the form a + bi.
√-4√-16/√-400

2007-09-06 14:44:53 · 3 answers · asked by Natalie 1 in Mathematics

After a ball rolls off the edge of a horizontal table at time t = 0, its velocity as a function of time is given by the following equation.

vector v=1.9 im/s-9.8tj m/s^2


The ball's displacement away from the edge of the table, during the time interval of 0.390 s during which it is in flight, is given by the following integral.

change of vector r = integral from 0 to .390 S of vector vdt

To perform the integral, you can use the calculus theorem below.

integral of A + Bf(x) dx = integral Adx + B integral of f(x) dx

You can think of the units and unit vectors as constants, represented by A and B. Do the integration to calculate the displacement of the ball.

find i hat

and find j hat

2007-09-06 14:44:51 · 2 answers · asked by surfing86 2 in Physics

In what body region is the patient's humerus located?

2007-09-06 14:44:47 · 3 answers · asked by KaitouKID 2 in Biology

Evaluate square root of (7399), using as much of the information below as is necessary.

[square root of (1.51) = 1.23, square root of (1.51 = 3.86]


Please show your workings clearly, thanks.

The working solutions used square root of (1.51) = 1.23 BUT not square root of (1.51) = 3.86...why is that so? Please tell me? Thanks a lot! =)

2007-09-06 14:43:28 · 4 answers · asked by ♪£yricảl♪ 4 in Mathematics

The problem is cos(pi/3 - pi/6)
I'm thinking it's 1/2 - sqrt3/2 which equals -.3660
Is this correct or am I doing the problem wrong?

2007-09-06 14:40:54 · 3 answers · asked by Nicky 2 in Mathematics

2007-09-06 14:39:50 · 15 answers · asked by mike 1 in Mathematics

The "Explanatory Supplement to the Astronomical Almanac" is a great reference book, but it was last published in 1992. When will the next revision be out?

2007-09-06 14:38:53 · 2 answers · asked by morningfoxnorth 6 in Astronomy & Space

Examples: 10/x-12/x-3+4=0, sqr5-x+1=x-2 and x^6-2x^3=0

2007-09-06 14:35:13 · 4 answers · asked by Tangela * 1 in Mathematics